The second photo is with the offside wheel turned clockwise about 30 degrees. It's the area aound the inner clamp we're looking at. I appreciate it's hard to pick out the detail from the photo.

 

The Fabia is 12 years old and 78k miles.

Edited 30 August, 20241 yr by phs12
Additional info

Might be split, might be grease from when it was last fitted, give it a squeeze like an MOT tester and see if more grease comes out.

Looks ok, clean it to get rid of the oil and grease.

Might be slit where the clip goes around the boot  or just about to go, to be sure you will need to put the car on a full right lock and then jack up the car to allow wheel to turn and rotate the wheel around also give it a good clean with a damp cloth with a little silicone spray on the cloth you will then see if it's split or leaking,if it's not leaking you might get it through an mot depending on the tester

MOT passed today, so boot must be ok😊

 

I'll clean up next time I'm under the car.